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Initial work on the WBT parser and its test suite

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This commit is contained in:
David
2026-06-25 22:45:08 +03:00
commit 94cc652049
10 changed files with 219 additions and 0 deletions
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.gitignore
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.idea
CMakeLists.txt
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cmake_minimum_required(VERSION 4.2)
project(wb)
set(CMAKE_CXX_STANDARD 26)
add_executable(wb main.cpp)
target_sources(wb
PUBLIC
FILE_SET CXX_MODULES FILES
wbt/wbt.cpp
)
# Test Executables
add_executable(test_parse test_parse.cpp)
target_sources(test_parse
PUBLIC
FILE_SET CXX_MODULES FILES
wbt/wbt.cpp
)
# Copy test files to build folder
add_custom_target(copy_test_files ALL
COMMAND ${CMAKE_COMMAND} -E copy_directory
${CMAKE_CURRENT_SOURCE_DIR}/test
${CMAKE_CURRENT_BINARY_DIR}/test
COMMENT "Copying test files to build directory"
)
add_dependencies(test_parse copy_test_files)
LICENSE
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MIT License
Copyright (c) 2026 David Gil de Gómez Pérez
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
main.cpp
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import wbt;
// WB is a site builder built from scratch
int main() {
return 0;
}
test/test_parse_invalid_character_expression.wbt
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<html>
<body>
<h1>Hello World</h1>
<p>{{ INVALID { EXPRESSION }}</p>
</body>
</html>
test/test_parse_no_expressions.wbt
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<html>
<body>
<h1>Hello World</h1>
</body>
</html>
test/test_parse_single_expression.wbt
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<html>
<body>
<h1>Hello World</h1>
<p>{{ VALID EXPRESSION }}</p>
</body>
</html>
test/test_parse_unclosed_expression.wbt
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<html>
<body>
<h1>Hello World</h1>
<p>{{ INVALID EXPRESSION }</p>
</body>
</html>
test_parse.cpp
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#include <iostream>
#include <fstream>
import wbt;
void test_parse_no_expressions() {
std::ifstream i("test/test_parse_no_expressions.wbt", std::ios_base::in);
std::ostream o(std::cout.rdbuf());
const WBT_Parser p(i, o);
p.parse();
}
void test_parse_single_expression() {
std::ifstream i("test/test_parse_single_expression.wbt", std::ios_base::in);
std::ostream o(std::cout.rdbuf());
const WBT_Parser p(i, o);
p.parse();
}
void test_parse_invalid_character_expression() {
std::ifstream i("test/test_parse_invalid_character_expression.wbt", std::ios_base::in);
std::ostream o(std::cout.rdbuf());
const WBT_Parser p(i, o);
p.parse();
}
void test_parse_unclosed_expression() {
std::ifstream i("test/test_parse_unclosed_expression.wbt", std::ios_base::in);
std::ostream o(std::cout.rdbuf());
const WBT_Parser p(i, o);
p.parse();
}
int main() {
std::cout << std::endl << "-----" << std::endl;
test_parse_no_expressions();
std::cout << std::endl << "-----" << std::endl;
test_parse_single_expression();
std::cout << std::endl << "-----" << std::endl;
test_parse_invalid_character_expression();
std::cout << std::endl << "-----" << std::endl;
test_parse_unclosed_expression();
std::cout << std::endl << "-----" << std::endl;
}
wbt/wbt.cpp
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module;
#include <fstream>
#include <iostream>
// This module is the transpiler from WBT to HTML for site build
export module wbt;
export enum WBT_States {
WBT_STATE_INIT,
WBT_STATE_OPEN,
WBT_STATE_EXPRESSION,
WBT_STATE_CLOSE,
};
export class WBT_Parser {
std::istream& input;
std::ostream& output;
public:
explicit WBT_Parser(
std::istream& i,
std::ostream& o
)
: input(i), output(o) {
}
void output_char(const char c) const {
output << c;
}
static void error(const std::string& msg, const int line, const int column) {
std::cerr << "Error (" << line << "," << column << "): " << msg << std::endl;
}
void eval(const std::string& expr) const {
output << "[EXPR: " << expr << "]";
}
void parse() const {
auto state = WBT_STATE_INIT;
std::string expr;
auto line = 1;
auto column = 1;
while (input.peek() != std::char_traits<char>::eof()) {
char c;
input.get(c);
// State machine
switch (state) {
case WBT_STATE_INIT:
if (c == '{') {
state = WBT_STATE_OPEN;
} else {
output_char(c);
}
break;
case WBT_STATE_OPEN:
if (c == '{') {
state = WBT_STATE_EXPRESSION;
} else {
output_char('{');
output_char(c);
state = WBT_STATE_INIT;
}
break;
case WBT_STATE_EXPRESSION:
if (c == '}') {
state = WBT_STATE_CLOSE;
} else if (c == '{') {
error("Invalid character inside of expression", line, column);
return;
} else {
expr += c;
}
break;
case WBT_STATE_CLOSE:
if (c == '}') {
eval(expr);
expr.clear();
state = WBT_STATE_INIT;
} else {
error("Unclosed expression", line, column);
return;
}
break;
}
if (c == '\n') {
line++;
column = 1;
} else {
column++;
}
}
}
};